Device for determining the load on a vehicle occupant
First Claim
1. A vehicle occupant restraint system for a vehicle comprisinga seat belt refractor for a seat belt, a bolt tightener drive, the drive moment of which may be transmitted by a rotor to the belt reel of the seat belt retractor, a torque transmission device exhibiting a given damping behavior transmits the drive moment to the belt reel, a first rotational angle sensor for scanning the rotational angle of the belt reel, the first rotational angle sensor supplies an electrical signal corresponding to a rotational angle of the belt reel to an evaluating device that determines from the electrical signal and the damping behavior a force acting upon torque transmission between the sear halt and a belted-in vehicle occupant, and a second rotational angle sensor for scanning sensor for scanning a rotational angle of the rotor, wherein the measurement data from the two rotational angle sensors are supplied to an evaluating device, which performs a diagnosis of the operation of the seat belt retractor by evaluating the measurement data supplied by the rotational angle sensors.
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0 Petitions
Accused Products
Abstract
A method and vehicle occupant restraint system for a motor vehicle, in which the webbing movement of a seat belt wound on a belt reel 1 caused by the body of the belted-in vehicle occupant is scanned and corresponding measurement data are fed to an evaluating device 3, wherein measurement data relating to the rotating movement of a rotor 2, in particular the electric motor rotor, which serves in tightening the seat belt webbing, may additionally be fed to this evaluating device 3.
47 Citations
8 Claims
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1. A vehicle occupant restraint system for a vehicle comprising
a seat belt refractor for a seat belt, a bolt tightener drive, the drive moment of which may be transmitted by a rotor to the belt reel of the seat belt retractor, a torque transmission device exhibiting a given damping behavior transmits the drive moment to the belt reel, a first rotational angle sensor for scanning the rotational angle of the belt reel, the first rotational angle sensor supplies an electrical signal corresponding to a rotational angle of the belt reel to an evaluating device that determines from the electrical signal and the damping behavior a force acting upon torque transmission between the sear halt and a belted-in vehicle occupant, and a second rotational angle sensor for scanning sensor for scanning a rotational angle of the rotor, wherein the measurement data from the two rotational angle sensors are supplied to an evaluating device, which performs a diagnosis of the operation of the seat belt retractor by evaluating the measurement data supplied by the rotational angle sensors.
Specification